1 /* 2 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. 3 */ 4 /* 5 * Licensed to the Apache Software Foundation (ASF) under one or more 6 * contributor license agreements. See the NOTICE file distributed with 7 * this work for additional information regarding copyright ownership. 8 * The ASF licenses this file to You under the Apache License, Version 2.0 9 * (the "License"); you may not use this file except in compliance with 10 * the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21 package com.sun.org.apache.bcel.internal.classfile; 22 23 24 import com.sun.org.apache.bcel.internal.Constants; 25 import java.io.*; 26 27 /** 28 * This class is derived from the abstract 29 * <A HREF="com.sun.org.apache.bcel.internal.classfile.Constant.html">Constant</A> class 30 * and represents a reference to a Double object. 31 * 32 * @author <A HREF="mailto:markus.dahm@berlin.de">M. Dahm</A> 33 * @see Constant 34 */ 35 public final class ConstantDouble extends Constant implements ConstantObject { 36 private double bytes; 37 38 /** 39 * @param bytes Data 40 */ 41 public ConstantDouble(double bytes) { 42 super(Constants.CONSTANT_Double); 43 this.bytes = bytes; 44 } 45 46 /** 47 * Initialize from another object. 48 */ 49 public ConstantDouble(ConstantDouble c) { 50 this(c.getBytes()); 51 } 52 53 /** 54 * Initialize instance from file data. 55 * 56 * @param file Input stream 57 * @throws IOException 58 */ 59 ConstantDouble(DataInputStream file) throws IOException 60 { 61 this(file.readDouble()); 62 } 63 64 /** 65 * Called by objects that are traversing the nodes of the tree implicitely 66 * defined by the contents of a Java class. I.e., the hierarchy of methods, 67 * fields, attributes, etc. spawns a tree of objects. 68 * 69 * @param v Visitor object 70 */ 71 public void accept(Visitor v) { 72 v.visitConstantDouble(this); 73 } 74 /** 75 * Dump constant double to file stream in binary format. 76 * 77 * @param file Output file stream 78 * @throws IOException 79 */ 80 public final void dump(DataOutputStream file) throws IOException 81 { 82 file.writeByte(tag); 83 file.writeDouble(bytes); 84 } 85 /** 86 * @return data, i.e., 8 bytes. 87 */ 88 public final double getBytes() { return bytes; } 89 /** 90 * @param bytes. 91 */ 92 public final void setBytes(double bytes) { 93 this.bytes = bytes; 94 } 95 /** 96 * @return String representation. 97 */ 98 public final String toString() 99 { 100 return super.toString() + "(bytes = " + bytes + ")"; 101 } 102 103 /** @return Double object 104 */ 105 public Object getConstantValue(ConstantPool cp) { 106 return bytes; 107 } 108 }